Nuclear Power Is Poised for a Comeback. The Problem Is Building the Reactors.

Western nations are betting big on nuclear power, decades after safety concerns pushed it out of favor—only they have lost their expertise in building the reactors.

Governments want nuclear energy’s carbon-free electricity to help tackle climate change and reduce dependence on Russian oil and gas. The U.S., France and China are backing a new generation of reactors that are intended to be easier to build and safer than earlier designs. Russia’s invasion of Ukraine has stoked the sense of urgency to bring them online.

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